We study the thermal buckling behavior of cylindrical shells reinforced with Functionally Graded (FG) wavy Carbon NanoTubes (CNTs), stiffened by stringers and rings, and subjected to a thermal loading. The equilibrium equations of the problem are built according to the Third-order Shear Deformation Theory (TSDT), whereas the stiffeners are modeled as Euler Bernoulli beams. Different types of FG...

An efficient beam element, the modified elastofiber (MEF) element, has been developed to capture the overall features of the elastic and inelastic response of slender columns and braces under axial cyclic loading without unduly heavy discretization. It consists of three fiber segments, two at the member ends and one at mid-span, with two elastic segments sandwiched in between. The segments are ...

The paper focuses on the mechanics of a compliant serial manipulator composed new type dual-triangle elastic segments. Both analytical and numerical methods were used to find stable unstable equilibrium configurations, as well predict corresponding shapes. stiffness analysis was carried for both loaded unloaded modes, matrices computed using Virtual Joint Method (VJM). results demonstrate that ...

We investigate the effect of defect geometry in dictating sensitivity critical buckling conditions spherical shells under external pressure loading. Specifically, we perform a comparative study between containing dimpled (inward) versus bumpy (outward) Gaussian defects. The former has become standard shape many recent shell-buckling studies, whereas latter remained mostly unexplored. employ fin...

Failure modes in recent earthquakes on lightly reinforced shear walls includes rebar fracture and out of plane buckling of its boundary elements. In latest edition of ACI 318 and also latest amendment of NZS 3101-2006 to avoid rebar fracture in boundary elements, the minimum reinforcement ratio for shear walls is increased. This experimental study investigates that rather than increasing reinfo...

In this study, weight optimization of the prismatic core sandwich panel under transverse and longitudinal loadings has been independently investigated. To solve the optimization problems corresponding to the mentioned loadings, a new Improved Constrained Differential Evolution (ICDE) algorithm based on the multi-objective constraint handling method is implemented. The constraints of the problem...